THE DISK AND TENTACLES. 145 



spots of rich yellow, which are usually margined with 

 deeper brown than the bands. The whole body is 

 surrounded by close-set faint lines of pale hue, some- 

 times scarcely distinguishable, except near the sum- 

 mit, where they cut the bands in such a manner as to 

 form, with other similar hues which there run length- 

 wise, a reticulated pattern. 



Towards the lower part of the body numerous 

 warts appear, mostly minute, but a few among them 

 are large and prominent. The body terminates above 

 in a slightly thickened rim, which is minutely notched, 

 but scarcely rises above the level of the disk, and is 

 obliterated when the tentacles are fully expanded. 



The disk is somewhat wider than the diameter of 

 the body, which it over-arches on all sides. Its 

 margin, is somewhat thin, and occasionally thrown 

 into puckered folds to a small extent. Thus it 

 appears to approach the pecuUar form of A. belUs. 

 The disk is nearly flat or slightly hollowed, but rises 

 in the centre into a stout cone, in the middle of which 

 is the mouth, edged with crenated lips. The tentacles 

 are arranged in seven rows, of which the innermost 

 contains about 20, the second 24, the third 48, the 

 fourth 96 : the other rows are too closely set and too 

 numerous to be distinguished. Probably the whole 

 number of tentacles in a full grown specimen may be 

 considered as certainly not less than 500. The 

 innermost row springs from the disk about midway 

 between the lips and the margin; they occasionally 

 stand erect, but more frequently arch outwards in 

 elegant curves. When distended with water these are 

 often an inch in length, and |^th of an inch in thick- 



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